After trying to boot a home made kernel, I suddenly detected this (while I was too slow hitting ^C):

Generating public/private rsa1 key pair.
Your identification has been saved in /etc/ssh/ssh_host_key.
Your public key has been saved in /etc/ssh/ssh_host_key.pub.

etc...
Thing is: I removed all disks to spare the disks from the constant power-cycling. Obviously it really starts ssh in ramdisk mode (despite my earlier remarks about that). So to enable ssh:

• power off
• remove all disks
• power on
• Wait
• ssh to the box, password is storage
• Put in the disks, raid start them, mount them and fix /usr/local/etc/<something> (check out /fs/sshd.sh to know what to do)